I started making some notes on the new English Duokan release and thought it'd be a good idea to start a FAQ thread.

Duokan Quidle FAQ

What is Duokan?

Its an alternative OS for the Kindle developed by a Chinese team. It's also available on Kindle2/Kindle DX/Kindle DXG. It's free for non-commercial use. It doesn't overwrite the official system in Kindle, but works as a secondary system. After installation, there's a boot menu where you can select from Duokan or the official system by pressing 1 or 2 ("Q" and "W" on a Kindle 3). Duokan improves on the compatiblity with Chinese characters of the K3, along other key features. It has a new PDF reader which provides full-screen reading, cropping the white margin and better support of two/four-column papers. Duokan can also do partial screen refreshes which is faster when switching pages compared with the default black screen refresh used in the original system. Users report that Duokan works better with comics and some complicated PDF files.
Adapted from: meisup

What are the principal benefits of using Duokan's OS?

More filetypes supported

Clear, crisp layout

More customizable

Better PDF reader

Better dictionary support

Decent MP3 player

Fine control of fonts and margins

Lots of shortcut keys

Folders (which can be easily organised)

What does Duokan mean?
"Read More". Note: When using Google Translate to read website www.duokan.com Duokan is translated as "see more" and "look at" means read me as in readme file.

Is there a browser?
No. There is a basic book find that connects to various sites though which works via wifi only. There is no support for 3G at present although its being worked on.

How can I use the bookstore feature?
TBA

How can I edit the English translations?
Try editing DK_System\system\Profiles\FontInfo_yw.txt (Note: not all text strings can be altered using this file)

Can I still enter terminal commands?
TBA

Where are my existing files?!?!
To see your ebooks from your original installation to Duokan go to Settings, page 3, select "F. Support old system" and confirm. You can also copy some ebooks to your DK_Documents folder to use them only in Duokan eg I put Word docs and ePub books in here.

What formats can Duokan read?

TXT

PDF

EPUB

MOBI

DJVU

ZIP

DOC

CHM (but NOT HTML files at present)

Image formats:

BMP

PNG

JPG/JPEG

GIF

TIFF

Audio formats:

MP3

Which Kindle do I have?
To find your serial number look in "Settings". The serial number prefixes are:

B001 = Kindle 1

B002 = Kindle 2 U.S.

B003 = Kindle 2 international version

B008 = Kindle 3 WIFI version

B006 = Kindle 3 3G + WIFI U.S. version

B00A = Kindle 3 3G + WIFI European version

B004 = Kindle DX U.S.

B005 = Kindle DX international version

B009 = Kindle DXG

Does installing Duokan affect the Kindle's software?
No. Duokan is independent of the original system, when you start the Kindle you can choose to boot .

How do I un-install?
Delete the folders starting DK and reboot the Kindle.

Will an Amazon firmaware upgrade affect Duokan?
No, you can upgrade the original system Kindle without issues.

How to get the MP3 player working?
Create DK_Music folder at same level as DK_Documents (may require Kindle reboot to see files).
ALT M pops-up the music player.
Aa key switches between control via playlist or 5-way controller.
Repeat and random modes are supported.

hi, I have a kindle 3 (3.0.3) with jailbrake and screensaver hacks on it. I tried to install duokan's FW, but as i restart, nothing changes and on my kindle doesn't appear the duokan's splash screen (when i have to press Q or W)
Any idea about it?

hi, I have a kindle 3 (3.0.3) with jailbrake and screensaver hacks on it. I tried to install duokan's FW, but as i restart, nothing changes and on my kindle doesn't appear the duokan's splash screen (when i have to press Q or W)
Any idea about it?

when you restart after update, you'll see the usual boy under tree image, then the screen will flash, and you'll get the same imagine with the loading bar. After about 20% progress, the Duokan screen boot screen will flash. It is only there for a few seconds, so be ready to press Q (Kindle3) or 1 (Kindle2).

when you restart after update, you'll see the usual boy under tree image, then the screen will flash, and you'll get the same imagine with the loading bar. After about 20% progress, the Duokan screen boot screen will flash. It is only there for a few seconds, so be ready to press Q (Kindle3) or 1 (Kindle2).

I reset to default my kindle, uninstalled jailbrake and screensaver, then installed duokan and reinstalled jailbrake and screeensaver: now it works!